/* eslint-disable vue/require-valid-default-prop */
/* eslint-disable vue/require-valid-default-prop */
<template>
  <el-select
    ref="select"
    :value="valueTitle"
    :size="size"
    :disabled="disabled"
    :clearable="clearable"
    :placeholder="placeholderText"
    @clear="clearHandle"
  >
    <el-option :value="valueTitle" :label="valueTitle" class="options">
      <el-tree
        id="tree-option"
        ref="selectTree"
        :accordion="accordion"
        :data="optionData"
        :show-checkbox="showCheckbox"
        :props="props"
        highlight-current
        :node-key="props.value"
        :default-expanded-keys="defaultExpandedKey"
        :default-expand-all="expandAll"
        @check-change="handleCheckChange"
        @node-click="handleNodeClick"
      >
        <span
          class="custom-tree-node"
          :class="showCheckbox && showLevel ? 'mutiple' : ''"
          slot-scope="{ node, data }"
        >
          <b
            v-if="showTip"
            style="width: 20px; margin-right: 15px"
            :data-for="data.type"
            :style="{ color: getColor(data.type) }"
            >{{ $dictUtils.getDictLabel("sys_office_type", data.type, "") }}</b
          >
          <span
            style="flex: 1"
            :class="showLevel && showLevel != data.type ? 'disabled' : ''"
            >{{ node.label }}</span
          >
        </span>
      </el-tree>
    </el-option>
  </el-select>
</template>

<script>
export default {
  name: "el-tree-select",
  props: {
    //可选列表
    showLevel: {
      type: Number,
      // eslint-disable-next-line vue/require-valid-default-prop
      default: false,
    },
    // 显示前缀
    showTip: {
      type: Boolean,
      default: false,
    },
    /* 配置项 */
    props: {
      type: Object,
      default: () => {
        return {
          value: "id", // ID字段名
          label: "label", // 显示名称
          children: "children", // 子级字段名
        };
      },
    },
    //全部展开
    expandAll: {
      type: Boolean,
      default: true,
    },
    /* 选项列表数据(树形结构的对象数组) */
    data: {
      type: Array,
      default: () => {
        return [];
      },
    },
    /* 选项列表数据(树形结构的对象数组) */
    list: {
      type: Array,
      default: () => {
        return null;
      },
    },
    /* 初始值 */
    value: {
      type: String,
      default: () => {
        return null;
      },
    },
    /* 初始值 */
    url: {
      type: String,
      default: () => {
        return null;
      },
    },
    disabled: {
      type: Boolean,
      dafault: () => {
        return false;
      },
    },
    showCheckbox: {
      type: Boolean,
      dafault: () => {
        return false;
      },
    },
    /* 初始值 */
    label: {
      type: String,
      default: () => {
        return null;
      },
    },
    /* 可清空选项 */
    clearable: {
      type: Boolean,
      default: () => {
        return true;
      },
    },
    /* 自动收起 */
    accordion: {
      type: Boolean,
      default: () => {
        return false;
      },
    },
    size: {
      type: String,
      default: () => {
        return "small";
      },
    },
    placeholder: {
      type: String,
      default: () => {
        return "请选择";
      },
    },
    isOnlySelectLeaf: {
      type: Boolean,
      default: () => {
        return false;
      },
    },
  },
  data() {
    return {
      valueId: this.value, // 初始值
      valueTitle: this.label,
      defaultExpandedKey: [],
      placeholderText: this.placeholder,
      treeList: [],
      valueData: this.data,
      multipleValue: [],
    };
  },
  created() {
    if (this.url !== null) {
      this.placeholderText = "加载数据中...";
      let interval = setInterval(() => {
        this.placeholderText = this.placeholderText + ".";
      }, 500);
      this.$http.get(this.url).then(({ data }) => {
        this.valueData = data.treeData;
        this.setTreeList(this.valueData);
        this.$nextTick(() => {
          this.initHandle();
          if (this.showCheckbox && this.showLevel) {
            let d = document.querySelectorAll(".mutiple");
            for (let x of d) {
              if (x.children[0].getAttribute("data-for") != 3) {
                x.parentNode.children[1].style.display = "none";
              }
            }
          }
          this.placeholderText = this.placeholder;
          clearInterval(interval);
        });
      });
    } else {
      this.valueData = this.data;
      this.setTreeList(this.valueData);
    }
  },
  methods: {
    getColor(type) {
      switch (Number(type)) {
        case 1:
          return "#0096ef";
        case 2:
          return "#009634";
        case 3:
          return "#F56C6C";
        default:
          break;
      }
    },
    setTreeList(datas) {
      // 遍历树  获取id数组
      for (var i in datas) {
        this.treeList.push(datas[i]);
        if (datas[i].children) {
          this.setTreeList(datas[i].children);
        }
      }
    },
    // 初始化值
    initHandle() {
      if (this.valueId) {
        if (this.showCheckbox) {
          let ids = this.valueId.split(",");
          this.$refs.selectTree.setCheckedKeys(ids);
          let titles = [];
          ids.forEach((id) => {
            this.treeList.forEach((d) => {
              if (id === d[this.props.value]) {
                titles.push(d[this.props.label]);
              }
            });
          });

          this.valueTitle = titles.join(",");
        } else if (
          this.valueId !== "1" &&
          this.$refs.selectTree.getNode(this.valueId)
        ) {
          this.valueTitle = this.$refs.selectTree.getNode(this.valueId).data[
            this.props.label
          ]; // 初始化显示
          this.$refs.selectTree.setCurrentKey(this.valueId); // 设置默认选中
          this.defaultExpandedKey = [this.valueId]; // 设置默认展开
        }
      }
      this.initScroll();
    },
    getNode(id) {
      return this.$refs.selectTree.getNode(id);
    },
    // 初始化滚动条
    initScroll() {
      this.$nextTick(() => {
        let scrollWrap = document.querySelectorAll(
          ".el-scrollbar .el-select-dropdown__wrap"
        )[0];
        let scrollBar = document.querySelectorAll(
          ".el-scrollbar .el-scrollbar__bar"
        );
        if (scrollWrap) {
          scrollWrap.style.cssText =
            "margin: 0px; max-height: none; overflow: hidden;";
        }
        if (scrollBar) {
          scrollBar.forEach((ele) => {
            // eslint-disable-next-line no-return-assign
            return (ele.style.width = 0);
          });
        }
      });
    },
    // 切换选项
    handleNodeClick(node, data) {
      if (this.showCheckbox) {
        return;
      }
      if (this.showLevel && this.showLevel != node.type) {
        return;
      }
      if (node["disabled"]) {
        this.$message.warning(
          "节点（" + node[this.props.label] + "）被禁止选择，请重新选择。"
        );
        return;
      }
      if (this.isOnlySelectLeaf && node.children.length > 0) {
        this.$message.warning(
          "不能选择根节点（" + node[this.props.label] + "）请重新选择。"
        );
        return;
      }
      this.valueTitle = node[this.props.label];
      this.valueId = node[this.props.value];
      this.$emit(
        "getValue",
        this.valueId,
        this.valueTitle,
        node,
        this.optionData
      );
      this.$refs.select.blur();
    },
    handleCheckChange(data, checked, indeterminate) {
      let nodes = this.$refs.selectTree.getCheckedNodes();
      if (this.showLevel && this.showLevel != data.type) {
        return;
      }
      this.valueTitle = nodes
        .map((node) => {
          return node[this.props.label];
        })
        .join(",");
      this.valueId = nodes
        .map((node) => {
          return node[this.props.value];
        })
        .join(",");
      console.log(this.valueId);
      this.$emit("getValue", this.valueId, this.valueTitle);
    },
    // 清除选中
    clearHandle() {
      this.valueTitle = "";
      this.valueId = null;
      this.defaultExpandedKey = [];
      this.clearSelected();
      this.$emit("getValue", null, null, null);
    },
    /* 清空选中样式 */
    clearSelected() {
      let allNode = document.querySelectorAll("#tree-option .el-tree-node");
      allNode.forEach((element) => element.classList.remove("is-current"));
    },
  },
  watch: {
    value() {
      this.valueId = this.value;
      if (
        this.value === "" ||
        this.value === null ||
        this.value === undefined
      ) {
        this.clearHandle();
      } else {
        this.initHandle();
      }
    },
    data() {
      this.valueData = this.data;
    },
  },
  computed: {
    optionData() {
      if (this.list) {
        let cloneData = JSON.parse(JSON.stringify(this.list)); // 对源数据深度克隆
        return cloneData.filter((father) => {
          // 循环所有项，并添加children属性
          let branchArr = cloneData.filter(
            (child) => father.id === child.parentId
          ); // 返回每一项的子级数组
          // eslint-disable-next-line no-unused-expressions
          branchArr.length > 0 ? (father.children = branchArr) : ""; // 给父级添加一个children属性，并赋值
          return father.parentId === "0"; // 返回第一层
        });
      } else {
        return this.valueData;
      }
    },
  },
};
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
.el-select {
  width: 100%;
}
.el-scrollbar .el-scrollbar__view .el-select-dropdown__item {
  height: auto;
  max-height: 274px;
  padding: 0;
  overflow: hidden;
  overflow-y: auto;
}
.el-select-dropdown__item.selected {
  font-weight: normal;
}
ul li >>> .el-tree .el-tree-node__content {
  height: 23px;
  padding: 0 20px;
}
.el-tree-node__label {
  font-weight: normal;
}
.el-tree >>> .is-current .el-tree-node__label {
  color: #409eff;
  font-weight: 700;
}
.el-tree >>> .is-current .el-tree-node__children .el-tree-node__label {
  color: #606266;
  font-weight: normal;
}
.disabled {
  color: #ccc;
}

/* 开发禁用 */
/* .el-tree-node:focus>.el-tree-node__content{
    background-color:transparent;
    background-color: #f5f7fa;
    color: #c0c4cc;
    cursor: not-allowed;
  }
  .el-tree-node__content:hover{
    background-color: #f5f7fa;
  } */
</style>
